Tubular articles of manufacture and method of making same

Details Tubular articles of manufacture and method of making same Tubular articles of manufacture and method of making same

1978-03-27

1980-05-20

Larson, Lowell A.

Metal deforming

By extruding through orifice

With cutting

72256, 72368, 291573A, B21D 5306

Patent

active

042033110

ABSTRACT:
Heat transfer elements are made by forming a plurality of tubes extending in side-by-side relation with connector means holding adjacent tubes together, cutting and outwardly projecting surface portions of the tubes to form fins, and then severing the connector means to divide the plurality of tubes into individual heat transfer elements.

REFERENCES:
patent: 2212912 (1940-08-01), Booth
patent: 3202212 (1965-08-01), Kritzer
patent: 3254400 (1966-06-01), Gordon

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